Liquid storage tank with floating



July 4, 1939.

o. A. BAILEY LIQUID STORAGE TANK WITH FLOATING` ROOF Original Filed Aug.13, 1952 5 Sheets-Sheet l July 4, 1939. o. A. BAILEY Re. 21,135

LIQUID STORAGE TANK WITH FLOATING ROOF Original Filed Aug. 13, 1932 5Sheets-Sheet 2 July 4, 1939.

Original Filed Aug. 1 5, 1932 5 Sheets-Sheet Z July 4, 1939. o. A.BAILEY LIQUID STORAGE TANK WITH FLOATING' ROOF Original Filed Aug. 13,1932 5 Sheets-Sheet 4 July 4, 1939.

O. A. BAILEY Re. 21,135 LIQUID STORAGE TANK WITH FLOATING ROOF OriginalFiled Aug. 13, 195" 5 sheetssheet 5 Reima mi 4. 1939 Re. 21,135-

cago Bridge & Iron Company, Chicago, Ill., a corporation of IllinoisOriginal No. 1,932,392, dated October 31, 1933, Se-

rial No. 628,753, August 13, 1932. Application for reissue February 15,1939, Serial No. 256,611

7 Claims. (Cl. 2211-26) 10 rary support can also be used in connectionwith by the roof .on its underside, the supports of one W or for aidingin the construction and erection of -set being movable to operativeposition where the tank, roof or parts thereof. they will engage thesupports oi the other set The distance above the bottom of the tank thator to inoperative position where they will clear the roof is thustemporarily supported is ordithe supports of the other set. As hereshown, the

narily high enough to permit workmento operset of supports carried bythe roof on its underl" ate under the same. In the normal operation ofside are the movable supports. the roof, however, when the same isiloating on Describing the form shown in Figs. 1 to 5, in-v liquid inthe tank, it is desirable to have the roof clusive, more particularly,I4, Il indicates radial descend to a lowest point somewhat closer to thesupporting channels on vthe bottom of the tank,

bottom of the tank. To permit this, therefore, the outer ends beingsupported by bracket mem- 20 the temporary sustaining means must be soconbers I5 attached to the side wall I0 and the inner structed that itcan be rendered inoperative or ends by A-frames I6, the feet of whichare atpartially inoperative, and vice versa, when liquid tached to thesupporting channels Il resting on is in the tank. the tank bottom II. Ashere shown, there are One of the features of my invention is the pro-`eight oi' these channel supports, one arranged 25 vision of suchsustaining means for a roof which substantially under each bulk head I2.will fulfill the requirements above referred to. 'Ihe set of supportscarried by the roof on its Other features and advantages of my inventionunderside include eight swingable gate members will appear more fully asI proceed with my I8 hingedly attached to the underside of thespecification. roof by the offset vertical pivot I3. Each of the 30 Inthose forms of devices embodying the feamembers I8 includes a wide footIl* adapted to tures oi my invention shown in the accompanyrest on theupper edge ofthe channel I4 and a ing drawings- *Y plate lab adapted toengage the underside of the Figure lis atop plan view; Fig. 2 is aviewtaken rooiI beneath the bulk head I2 when the gate as indicatedl by theline 2 of Fig. 1; Fig. 3 is a view?v is in operative position, as shownin Fig. 4. 35 in side elevation of one of the sustaining means; The gatemay be swung inwardly on the pivot Fig. 4 is a view taken as indicatedby the line 4 I9 to inoperative position, as shown by the broken of Fig.3; Fig. 5 is a view taken as indicated by lines in Fig. 5, in whichposition all the gates the line 5 of Fig. 3; Fig. 6 is a view similar toFig. will clear the channel supports Il by passing be- 3 showing amodined form; and Fig. 'I is a view tween them. A depending angle iron23 attached 4u taken as indicated by the line 1 of Fig. 6. to theunderside of the roof is provided to limit As shown in the drawings, IIImay indicate the the outward swinging of the gate or support I3.cylindrical side wall of a liquid storage tank and The lower end of thepivot is supported by the II, the bottom thereof. I2 indicates, ingeneral, diagonal braces 2i and 22, the latter serving as a iioatingroof including a nat centralsheet metal a stop for the gate `when swungto its inopera- 45 portion I2* supported by an annular pontoon I2. tiveposition. here shown as divided into eight compartments For swingingeach gate I provide a shaft 23 exby the bulk head llc. tending through asuitable tube 2l in the pontoon It is to be understood that any suitablemeans of the floating roof, the upper end of the shaft 5o (not shown)may be employed for sealing the 23 being provided with a crank 25 havingan .5o space I3 between the periphery I2d of the floating operatinghandle 23. The lower end o1' the shaft roof and the shell or side wallI0 of the tank. 23 is provided with a crank 21; the end of which Ingeneral, my invention includes a set of supis attached by a connectingrod 2l to the gate I3. ports between the rooi' and bottom of the tank 29may indicate a notched member on the top movable from operativeposition, where they will of the pontoon in which the crank 3i may rest55 oi the tank when the latter is empty. It is frequently necessary ordesirable to support the roof temporarily a certain distance above thebottom of.the tank when the same is empty for cleaning, repair andinspection purposes. Such a-temposupportthe roof spaced the desired andpredetermined distance above the bottom of the tank, to inoperative*position, where they will permit the roof to descend closer to thebottom of the tank, and vice versa, together 'with means for controllingsaid supports from above the roof.

In the form shown in Figs. 1 to rinclusive, the supporting means includea set of supports on the bottom of the tank and a set of supportscarried to retain the rank in the position shown in Fig. 4. To releasethe crank from this notch, the

-same may be lifted somewhat, the shalt I3 slid- In the form of supportshown in Figs. 6 and 'l I provide a plurality of legs Iii hingedlyattached to the root by the horizontal pivots ll near the periphery ofthe same. Each of these legs is adapted to hang in a vertical operativeposition. as shown by the solid lines in Fig. 6, or be lifted up into'inoperative position, as shown by the broken lines in Fig. 6. As hereshown, each leg may be lifted by a cable or chain I2 extending through atube 33 in the pontoon and adapted to be wound upon a winch 3l on top ofthe roof. The bottom of each leg is preferably provided with anextension l! to help distribute' the load and also to counterweight theleg sd that it will hang substantially vertical. As shown in Fig. '7,each of the legs 3D may be made of considerable width with cross-brgliil in order to lessen the possibility ot circular de sway.

While I have show n and described certain embodiments of my invention,it is to be understood that it is capable of many modifications. Changestherefore, in the construction and arrangement may be made withoutdeparting from the spirit arid scope of the invention as disclosed inthe appended claims, in which it is my intention to claim all noveltyinherentin my inventlon as broadly as permissible, in view of the priorart.

What I regard as new, and desire Letters Patent, is:

1. A liquid storage tank, comprising a bottom and side wall, a iloatingroof adapted to normally rest upon liquid in the tank, a set of hingedsupports between the root and the bottom of the tank swingable fromoperative position where they will support the roof spaced apredetermined distance above the bottom ot the tank to inoperativeposition where they will permit the roof to descend closer to the bottomof the tank, and vice versa, and means for controlling said supportsfrom above the roof.

2. A liquid storage tank, comprising a bottom to secure by and sidewall.a iloating roof adapted to normally rest upon the liquid in the tank,and means for' sustaining the roo! spaced a predetermined distance abovethe bottom ot the tank when empty, said means including a set ot radialsupports on the bottom of the tank and a set of supports carried by theroof on its underside on vertical pivots and swingable on said pivotsfrom operative position where they will engage the radial supports onthe bottom of the tank to inoperative positionA where they will clearsaid radial supports, and vice versa.

3. Apparatus as claimed in claim 2, with means for swinging saidsupports operable from above the roof.

4. A liquid storage tank, comprising a bottom and side wall, a floatingroof adapted to normally rest upon liquid in the tank, and means forsustaining the roof spaced a predetermined distance above the bottom ofthe tank when empty, said .L

means including a set of supports on the bottom of the tank, and aswingable gate member attached to the underside ot the roof by an odsetvertical pivot for each of the supports on the bottom of the tank.

5. Apparatus as claimed in claim 4. with means for swinging the gatemembers on their vertical pivots from above the root.

6. A liquid storage tank, comprising a bottom and side wall, a oatingroot adapted to normally rest upon liquid in the tank, and means forsustaining the root spaced a predetermined distance above the bottom ofthe tank when empty, said means including a set of supports on thebottom of the tank and a set of movable supports attached to theunderside of the roof on vertical pivots and swingable on said pivots tooperative position where they will engage the supports of the other setor to inoperative position where they will clear said supports of saidother set.

'7. Apparatusas claimed in claim 6 with means operable from above theroof for swinging said supports on said pivots.

o'rrnannmanam.

